CVE-2026-54205 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox 's link storing functionality (//ServerClient_celink.htm) accepts a “pathname” parameter, which can be set to network locations using UNC paths (e.g., “\\Server\Share”). The server processes these paths without validation, resulting in outbound connection attempts to attacker-controlled SMB servers. This enables authenticated attackers to trigger the server to authenticate to arbitrary SMB endpoints, potentially exposing NTLM authentication information (such as NTLM hashes). If outbound connections to port 445 (SMB) are permitted, attackers can use this to conduct SMB relay or credential theft attacks. Exploitation of the “pathname” parameter is possible without authentication. This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability in question resides within the link storing functionality of Tobit Laboratories AG TeamDavid's Webbox product, specifically in the //ServerClient_celink.htm component that handles pathname parameters. This flaw represents a classic server-side parameter validation issue that allows remote attackers to manipulate input values and initiate unauthorized network communications. The system accepts UNC paths without proper sanitization or validation, creating an attack surface where malicious actors can specify arbitrary network locations including SMB endpoints. This behavior directly violates security principles of input validation and access control, as the application fails to implement proper restrictions on network resource access.
The technical exploitation mechanism involves the server processing user-supplied pathname parameters through the vulnerable link storage functionality without any form of validation or sanitization. When an attacker submits a UNC path such as "\\Server\Share", the system attempts to establish outbound connections to these specified locations without verifying their legitimacy or security posture. This creates a scenario where authenticated attackers can leverage this functionality to force the server into making network connections to attacker-controlled SMB servers, effectively turning the vulnerable application into a potential relay point for credential theft attacks.
The operational impact of this vulnerability is significant and multi-layered, particularly when outbound connections to port 445 are permitted. Attackers can exploit this weakness to conduct SMB relay attacks or credential theft operations, potentially capturing NTLM authentication information including NTLM hashes that can be used for further lateral movement within networks. This issue affects TeamDavid through Rollout 524 and represents a critical security gap that could enable adversaries to escalate privileges, gain unauthorized access to network resources, or compromise entire network infrastructures. The vulnerability's impact is amplified by the fact that exploitation does not require authentication, making it particularly dangerous for publicly accessible web applications.
This vulnerability aligns with CWE-20, which describes "Improper Input Validation" and maps to several ATT&CK techniques including T1567.002 for "Local Network Configuration/Access" and T1078 for "Valid Accounts". The lack of proper input validation creates a pathway for attackers to manipulate network communications and potentially compromise authentication mechanisms. Organizations should implement network segmentation, restrict outbound SMB connections, and deploy proper input validation controls to mitigate this risk. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar issues within the application's codebase that may present analogous attack vectors.
The remediation approach should focus on implementing strict input validation for pathname parameters, particularly around UNC path handling and network location specifications. Security controls should include disabling outbound SMB connections by default, implementing proper access control lists for network resource access, and deploying network monitoring to detect unauthorized connection attempts. Organizations should also consider implementing application firewalls or web application firewalls to filter suspicious network communications and prevent exploitation of this vulnerability across their infrastructure.